Driving mechanism



'Augf. Y 23`1927.

J. o. ARREY DRIVING MECHANISM Filed Feb. e, 1924 sheets-sheet 1 :ja/m di@ 3 Sheets-Sheet 2 c/a/z J. O. CARREY DRIVING MECHANISM Filed Feb. 9. 1924 Aus. 23', 1927.

Aug.l 23 1927. 1,639,647

J. O. CARREY DRIVING MECHANISM dit Patented Aug. 23, 1927.

UNITED 'sTATEs 1,639,641 PATENT OFFICE.

JOHN O. OAREEY, OF sfr. LoUIs'MIssOURI, ASSIGNOE 'ro CARREYI-,MORSE ENGINEER- ING OOMI'ANY, OF sT. LOUIS, MIssoUEL-.A CORPORATION OE MISSOURI.

DRIVNG MECHANISM.

Application led February 9, 1924. Serial No. 691,566.

This invention relates to new and useful improvements in driving mechanisms, and the objects of the invention are to provide a driving mechanism which is of simple and durable construction, is noiseless in operation, contains few parts, which can be easily assembled or disassembled, and which can be economically manufactured.

Further objects of the invent-ion `are to provide a driving mechanism having oppositely disposed members which are in Operative engagement with an eccentrically mounted driving element and have rolling operative engagement with a reciprocating cross head for actuating the same. n

f Still further objects of the invention are to provide a mechanism for translating rotary motion into reciprocating motion in a simple and efficient manner, thereby 'reducing the cost of operation to minimum.

iVith these and other Objects in view, my invention consists in certain novel Vfeatures of construction and arrangement of parts, hereinafter more fully described and claimed and illustrated in the accompanying drawings, in which- Figure 1 is a longitudinal cross section through acompressor provided with my improved driving mechanism.

Figure 2 is a horizontal cross section through the same.

Figure 3 is a. perspective detail view of one of the rolling members.

Figure 4L is a vertical cross section through the same.

Figure 5 is a detail cross section illustrating the manner in which the wedge-shaped blocks forming bearings for said rolling members are adj ustably mounted in the cross hea-d. g

Figure 6 is a detail view of the driving mechanism showing the eccentric member in its eXtreme lleft position.

Figure 7 is a similar view showing the position occupied by said driving mechanism when the eccentric mechanism is moved onequarter turn. Y

Figure 8 is a Asimilar view vshowing `the eccentric occupying its extreme right posi- D0 tion. Y

Figure 9 shows the eccentricv occupying the third quarter of its cycle ofl operation. f

. Figure 10v shows ka modified form of driv ing mechanism wherein instead? of using rolling blocks a ring is utilized to transmit through a suitable bearing 17. Shaft 16 in Figure 1'. A pair of oppositely disposed motion from the eccentric to the sliding frame.v c n' The driving mechanism disclosed in the present application and illustrated in the accompanying drawings is shown applied to a compressor or pump, but itis to be under stood that the driving mechanism of `my improved construction is equally as well adapted for various other purposes wherein it is desired to use reciprocating motion.

In the present instance, Vthe .mechanism is enclosedl in a casing 10 which is hermetically sealed to prevent the escape of the circulating fluid and also to prevent leakage of the lubricating medium with Awhich said casing is filled and in which the mechanism operates. A horizontally disposedl shaft 11 is journaled in suitable bearings arranged in bosses 12 of said casing and said shaft is driven in any suitable manner, such as by a gearllr fixed to said shaft and meshing with a pinion 15 which is arranged in the lower part of casing 10 and is fixed on a driven shaft 16 which extends into said casing may be connected to the motor or may be driven in any other suitable manner such as byr a belt and pulley. An eccentric 18 is fixed to shaft 11, preferably by a key 18, and engaging the peripheral surface of said eccentric are -the concave faces 19 of the .in ner ends ofpoppositely disposed blocks 20. The outer ends of said blocks are provided with convexed faces 21 which have a rolling bearing on the inwardly presented faces 22 of bearing blocks 24.

These bearing blocks rest against the end walls 25 of` a reciprocating cross headQ which is preferabb7 box-shape in cross section, havingtop and bottom lwalls 27 andan outwardly presented side wall or flange 28. A centrally Idisposed opening 29 is formed in said lsidewall to provide access to the eccentric and the rolling lblocks 20, as shown pistons 30 is fixed to the end walls 25 and project therefrom into oppositely disposed axially aligned cylinders 10a carried byfsaid casing 10.

In'the drawings, twostage type of com- 105 pressor is shown and pistons 30 are in telescopic engagement with cooperating pistons 31 which are detachably carried by a reciprocating cross head 32 which is similar in construction to cross head 26 having end 110 Bearing blocks 24 and 37 are preferably vwedge-shaped soy that by adjusting said blocks longitudinally in the proper direc` ion, rolling members 2O Vand 38 may be mounted in proper operative contact with their respective eceentrics and bearing blocks. rlhe adjustment of the bear'ig blocks is accomplished by means of adjust-- ing screws 40 which are rotatably seated in the top and bottom walls of cross heads24 and 32 and have their tlireaded ends screwscated in threaded openings formed in the ends of bearing blocks 24 and 37. Thus. by adjusting screws 40 in theproper direction'said bearing` blocks may be moved upwardly or downwardly, as desired.

In order to prevent displacement'of said bearing` blocks, the side walls 2S and of their respective cross heads 'are provided with'elongated slots 43 which are traversed by shanlcs of screws 44 carriedy by said bear ing blocks and having their heads 45 bearingr against the side walls ofthe respective cross heads.

The wedgeshape of the bearing blocks is preferably obtained by forming the inner bearing faces of said blocks .inclined from the perpendicular as shown in Figures G to 9, inclusive, and the rolling` members are ar ranged'at an angle to the longitudinal axis of the cross head, as shown by line :c4-m in Figure 6, the angle of inclination beine' toward the line of rotation of the eccentric. Thus the operating pressure is brought to bear against the bearingv blocks at a. point slightly in advance of the longitudinal axis of the cross head, thereby preventing slip ping of the convex faces of the rolling mem bers on the inclined faces of the bearing blocks and insuring' at all times proper op erative contact. between said rolling mem bers and their respective bearingblocks.

f The-rolling members are Qrovided'in1 their top and bottom edges adjacent to their outer ends with curved portions 4G which are adapted to be engaged byV transversely curved lugs 47 projecting` laterally and inwardly from the side faces of cross heads 26 and 32. `These lugs serve to guide the blocks inth'eir proper operative positions andy prevent the accidental displacement thereof. The concave faces of rolling' blocks 20 andv 38 are channeled and the channels so formed are yfilled with suitable metal. such as babbitt, as indicated at 47 inY Figures 3 and 4. The bodies of the rolling' membersare providedY with series of angularly disposed boresf48, vertically disposed bores 49, and horizontally disposed bores 50 which are then filled lwith babbitt. These bores preferably communicate with each other rwith'the channel and serve to con'- vey away from the concave faces of .said blocks and dissipate vthe heat generated by friction'between the eccentrics'and said con cave faces. Y

In the modified form shown in Figure l0 an eccentricl instead of engaging'oppo sitely disposed members, engages a ring 52 which has a rolling engagement with the ad justable track members or blocks carriedrby y the sliding cross'head. Vhile; this construe tion effectively engages the blocks, it does not provide any means of take-up between thev eccentric and the rollingmember. .lily iiiproved driving mechanism providesv a quiet running` mechanism by means of Which the power is transmitted from the shaft to the reciprocatory members in-an even balanced manner so that all violentk or sudden jars or motions are eliminated thereby pro longing the life of the parts and providing sn'iooth running mechanism.

lhiie I have shown and described the preferred form of my invention. it is obl vious that various changes in the, construction andarrangement of parts of my-improved drivingmechanism may be made and substituted for those herein shown and rdescribed without departing from the spirit of my invention. l Y

l claim:

-].. A driving mechanism comprising'an eccentric, a pair of oppositely disposed members having concaveinner ends for partially engaging` the peripheral face of said eccentric and having` convex outer ends disposed eccentrically to said inner ends, and reciprocatingmembers having` faces inclined from vertical engagedby the outer convex iro ends of said first mentioned. .members at j inner ends, and reciprocating members having faces inclined from vertical and Vin rolling operative contact with said convex ends and operable by said blocks. Y

3. A driving mechanism comprising` an eccentric, a` pair of oppositely disposed.v

blocks in engagement With said eccentric,

a reciprocating boX-shaped cross head hav-1 ing a ,rolling operative contactvvith .the .outer convex, endsof said blocksrand oper able thereby, and means projecting laterally from the side wall of said cross head and engaging vtop and bottom faces of said blocks for retaining said blocks in position.

, 4. A driving mechanism comprising in combination, a revoluble shaft, an eccentric fixed on said shaft, a pair of oppositely disposed members having their inner ends formed concave for engaging said eccentric and the outer ends convex, a reciprocating box-shaped cross head, and bearing blocks vertically disposed in said ycross head and having their inner faces inclined from vertical and engaged by said members for actuating said cross head.

5. A driving mechanism comprising in combination, a shaft, an eccentric member fixed thereon, a pair of oppositely disposed rolling members having their inner ends in operative engagement lwith said eccentric and provided with convex outer ends, a

slidable cross head, and bearing blocks in said cross head having their inner faces inclined from vertical in a predetermined relation to the line of travel of said eccentric and forming'tracks for said convex ends of said members whereby the latterhave rolling operative engagement therewith and operate said cross head.

6. A driving mechanism comprising a shaft, a driving member eccentrically mounted thereon, a pair of oppositely disposed members having their inner ends in operative engagement with said eccentric member and provided with convex outer ends, a box-shaped slidable cross head, means extending laterally therefrom for engaging and retaining said rolling members in position, and bearing blocks adjustably arranged in said cioss head and having inwardly 1presented inclined faces for forming rolling engagement with the lconvex ends of saidV members.

7. A driving mechanism comprising in combination, a shaft, an eccentric fixed thereon, a pair of oppositely disposed rolling members having their inner ends vin operative engagement with said eccentric and provided with curved outer ends, a reciprocating cross head, bearing blocks rigidly held in said cross head adapted to form tracks inclined from vertical in a predetermined relation to the line of travel of said eccentric for receiving the convex ends of said rolling members, and means' for adjusting said bearing blocks longitudinally so las to vary said tracks radially relative to said shaft to maintain said members in proper operative engagement.

8. In a driving mechanism, the combination with a shaft and a member eccentrically fixed thereon, of a reciprocating cross head provided at its ends with inwardly disposed track bearings having faces inclined from vertical, and a pair of opposed members angularly disposed relative to the line of travel of, said crosshead and having their inner ends in operative engagement with said eccentrically mounted member and having convex outer ends for forming rolling operative engagement with said track members at points disposed on opposite sides of the longitudinal axis of said cross head. I

9. In a driving mechanism of the class described, a driving block having a concave face adapted to engage the peripheral face of an eccentric driving member, and a con- Vex face adapted to form rolling engagement with a cross head member and having formed in its upper and lower faces suit-l able seats adapted to be engaged by retaining members of the cioss head.

10. In a driving mechanism of the class described, a driving element having a concave face adapted to engage the peripheral face of an eccentric driving member, and a convex face adapted to enter into rollino engagement with a cross head member, sai block being formed of non-metallic material and provided in its concave face with a channel and in its body portion with a plurality of bores communicating with said channel, said channel and bores being filled with suitable metal whereby the heat produced by the bearing surfaces of said driving element and said eccentric member is distributed through the body portion of said element.

ll` A mechanism comprising in combination an eccentrically mounted actuating member, a pair of oppositely disposed elongated members having concave inner ends operatively engaging said eccentric member and provided with convex outer ends, a slidable crosshead, track members thereon andy having their inner faces inclined from ver-- tical for engaging said convex ends of said elongated members, whereby said crosshead is reciprocated, said elongated members being provided in their top and bottom edges with V-shaped notches, and means on'said crosshead extending into said notches yfor engaging and retaining said elongated members in operative positions.

In testimony whereof I hereunto affix my signature this 4th day of February, 1924.

JOI-IN O. CARREY. 

